<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>Document</title>
</head>
<body>
<p id="demo"></p>
	<script type="text/javascript">
		var x = 15 * 5;
		debugger;
		document.getElementById('demo').innerHTML = x;
	</script>
</body>
</html>